It is fine white nontoxic and no curing pollution with specific gravity of 1.08. It can slightly dissolve in hot ethanol, but not in water.

白色细微粉末，无毒，无硫化污染，比重1.08，不溶于水，微溶于热的乙醇。

youdao

Across that white forehead was no smudge, no trace of an earthly pollution-no mark of a terrestrial dishonour .

雪白的前额上没有一个污点，没有一丝灰尘之间受过污辱的痕迹--没有一点儿人间的耻辱的烙印。

youdao

One White House official noted that respiratory illness attributed to air pollution is the No. 1 cause of death in China.

CNN: AllPolitics - Progress Expected During U.S.-China Summit